+ boolean hasFriend(String friendSoneId);
+
+ /**
+ * Adds the given Sone as a friend Sone.
+ *
+ * @param friendSone
+ * The friend Sone to add
+ * @return This Sone (for method chaining)
+ */
+ Sone addFriend(String friendSone);
+
+ /**
+ * Removes the given Sone as a friend Sone.
+ *
+ * @param friendSoneId
+ * The ID of the friend Sone to remove
+ * @return This Sone (for method chaining)
+ */
+ Sone removeFriend(String friendSoneId);
+
+ /**
+ * Returns the list of posts of this Sone, sorted by time, newest first.
+ *
+ * @return All posts of this Sone
+ */
+ List<Post> getPosts();
+
+ /**
+ * Sets all posts of this Sone at once.
+ *
+ * @param posts
+ * The new (and only) posts of this Sone
+ * @return This Sone (for method chaining)
+ */
+ Sone setPosts(Collection<Post> posts);
+
+ /**
+ * Adds the given post to this Sone. The post will not be added if its {@link
+ * Post#getSone() Sone} is not this Sone.
+ *
+ * @param post
+ * The post to add
+ */
+ void addPost(Post post);
+
+ /**
+ * Removes the given post from this Sone.
+ *
+ * @param post
+ * The post to remove
+ */
+ void removePost(Post post);
+
+ /**
+ * Returns all replies this Sone made.
+ *
+ * @return All replies this Sone made
+ */
+ Set<PostReply> getReplies();
+
+ /**
+ * Sets all replies of this Sone at once.
+ *
+ * @param replies
+ * The new (and only) replies of this Sone
+ * @return This Sone (for method chaining)
+ */
+ Sone setReplies(Collection<PostReply> replies);
+
+ /**
+ * Adds a reply to this Sone. If the given reply was not made by this Sone,
+ * nothing is added to this Sone.
+ *
+ * @param reply
+ * The reply to add
+ */
+ void addReply(PostReply reply);
+
+ /**
+ * Removes a reply from this Sone.
+ *
+ * @param reply
+ * The reply to remove
+ */
+ void removeReply(PostReply reply);
+
+ /**
+ * Returns the IDs of all liked posts.
+ *
+ * @return All liked posts’ IDs
+ */
+ Set<String> getLikedPostIds();
+
+ /**
+ * Sets the IDs of all liked posts.
+ *
+ * @param likedPostIds
+ * All liked posts’ IDs
+ * @return This Sone (for method chaining)
+ */
+ Sone setLikePostIds(Set<String> likedPostIds);
+
+ /**
+ * Returns the IDs of all liked replies.
+ *
+ * @return All liked replies’ IDs
+ */
+ Set<String> getLikedReplyIds();
+
+ /**
+ * Sets the IDs of all liked replies.
+ *
+ * @param likedReplyIds
+ * All liked replies’ IDs
+ * @return This Sone (for method chaining)
+ */
+ Sone setLikeReplyIds(Set<String> likedReplyIds);
+
+ /**
+ * Returns the root album that contains all visible albums of this Sone.
+ *
+ * @return The root album of this Sone
+ */
+ Album getRootAlbum();
+
+ /**
+ * Returns Sone-specific options.
+ *
+ * @return The options of this Sone
+ */
+ Options getOptions();
+
+ /**
+ * Sets the options of this Sone.
+ *
+ * @param options
+ * The options of this Sone
+ */
+ /* TODO - remove this method again, maybe add an option provider */
+ void setOptions(Options options);
+
+ AlbumBuilder newAlbumBuilder() throws IllegalStateException;
+
+ PostBuilder newPostBuilder();
+
+ PostReplyBuilder newPostReplyBuilder(String postId) throws IllegalStateException;
+
+ Modifier modify();
+
+ interface Modifier {
+
+ Modifier setLatestEdition(long latestEdition);
+ Sone update();
+